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# img072 - 77 77777 driving at speed 25 mph Under similar...

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Unformatted text preview: 77 77777 driving at speed 25 mph. Under similar road conditions, what is your steppim (Hint: assume same constant negative acceleration in both cases.) (3) 60 ft (4) 15 ft (5) 4s a 5. You can stop your car within 15 ft when distance if you are driving at 60 mph? (1) 86 ft (2) 36 ft 6. A balloon moving straight up with speed 15 m/s releases a package at a height of 75 m above the ground. Find the time needed for the package to reach the ground. (1) 5.7 s (2) 12.0 s (3) 7.9 s (4) 9.6 s (5) 15.3 s randed hiker. The plane is traveling horizontally at 55 m/s 0 at impact with the ground? (5) 182 m/s mergency rations to a st 7. A rescue plane drops a package of e What is the speed of the packag at a height of 150 m above ground. (1) 77 m/s (2) 109 m/s (3) 55 m/s (4) 163 m/s 8. A baseball leaves the bat with a speed of 44.0 m/s and an angle of 300° above the horizontal. A 5.0-m-high fence is here the ball is struck. Assuming the ball leaves the bat located at a horizontal distance of 132 m from the point w he ball clear the fence? (1) 13.4 m (5) 1.2 m ﬁrst has a magnitude of 150 N and makes an angle of 120.0° with the magnitude of 70 m/s” directed at an angle of 35.0" to the positive x relative to the positive x axis. (4) 215 N, 775° (5) 105 N, -52.6° 9. Two forces act on a particle of mass 2 kg. The positive x axis. The resultant acceleration has a axis. Find the magnitude and direction of the second force (1) 196 N, ~14.7° (2) 39.9 N, 53° (3) 162 N, —33.1° 10. A 68 kg man stands on a spring scale in an elevator. What weight does the scale read if the elevator accelerates upward at 2.0 “1/82? (1) 802 N (2) 530 N (3) 666 N (4) 743 N (5) 937 N on a horizontal surface and a boy pulls on it with a force that is 30° above the horizontal. If the 11. A 12-kg crate rests coefﬁcient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is: (1) 44 N (2) 47 N (3) 54 N (4) 56 N (5) 71 N 12. A 150—N sled is pulled up a 28° slope at a constant speed by a force of 100 N directed along the slope. What is the coefﬁcient of kinetic friction between the sled and the slope? (2) 0.53 (3) 0.13 (4) 0.33 (5) 0.42 (1) 0.22 13. In order to receive credit for this problem, you must correctly code (“bubble”) your 5-digit test number onto your scan sheet and also select the correct rwponse below. Cheek right now that the exam number is correctly bubbled. (1) I have correctly bubbled my UFID and test number. (2) I don’t think this is important. (3) I bubbled the wrong test number. (4) I don’t have time to check. (5) I bubbled the wrong UFID. 170 ...
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